Climate Comfort Score
63/100
Good
NOAA 1991–2020 normals 52°F annual avg Public-domain federal data
Boston Logan, MA Climate
Pulled from NOAA NCEI 1991–2020 normals →: average temperature, precipitation, and comfort score
- 52°F
- Avg annual temp
- 63/100
- Comfort score
- 43.6"
- Annual precip
- 219d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Boston Logan
Boston Logan, Massachusetts averages 52°F a year and scores 63/100 on the comfort index - good, milder than 47% of U.S. cities.
- 52°F
- yearly average temperature, NOAA normal
- 63/100
- comfort score, milder than 47% of U.S. cities
- 43.6"
- annual precipitation · 49" snow
- 219 days
- frost-free growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
52°F (11°C)
Avg High
59°F
Avg Low
45°F
Annual Precip
43.6"
Annual Snow
49.2"
Comfort Score
63/100
Good
Avg Annual Temperature
52°F
30-year mean (NOAA NCEI)
Annual Precipitation
43.6"
Plus 49.2" of snow
Comfort score vs national 100-point ceiling (Boston Logan) 63.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Boston Logan area.
How Boston Logan compares to every U.S. city
Boston Logan's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
63 Top 53% higher than 47% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for Boston Logan
MethodologyZooming out from Boston Logan's own normal, the chart below shows how the U.S. land temperature anomaly has tracked the global mean since 1900 - the most recent decade sits warmer than the 30-year mean shown here.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 37°F (3°C) | 23°F (-5°C) | 30°F (-1°C) | 3.4" | 14.3" | 24.8 | 0.0 |
| February | 39°F (4°C) | 25°F (-4°C) | 32°F (0°C) | 3.2" | 14.4" | 21.7 | 0.0 |
| March | 46°F (8°C) | 31°F (0°C) | 38°F (3°C) | 4.2" | 9.0" | 16.2 | 0.0 |
| April | 56°F (14°C) | 41°F (5°C) | 49°F (9°C) | 3.6" | 1.6" | 2.1 | 0.1 |
| May | 67°F (19°C) | 50°F (10°C) | 58°F (15°C) | 3.3" | 0.0" | 0.0 | 0.6 |
| June | 76°F (25°C) | 60°F (15°C) | 68°F (20°C) | 3.9" | 0.0" | 0.0 | 2.5 |
| July | 82°F (28°C) | 66°F (19°C) | 74°F (23°C) | 3.3" | 0.0" | 0.0 | 6.3 |
| August | 80°F (27°C) | 65°F (18°C) | 73°F (23°C) | 3.2" | 0.0" | 0.0 | 3.8 |
| September | 73°F (23°C) | 58°F (15°C) | 66°F (19°C) | 3.6" | 0.0" | 0.0 | 0.8 |
| October | 62°F (17°C) | 48°F (9°C) | 55°F (13°C) | 4.0" | 0.2" | 0.2 | 0.0 |
| November | 52°F (11°C) | 38°F (3°C) | 45°F (7°C) | 3.7" | 0.7" | 6.8 | 0.0 |
| December | 42°F (6°C) | 29°F (-2°C) | 36°F (2°C) | 4.3" | 9.0" | 19.8 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 3.4"
Snow: 14.3"
11.8 days with precipitation
February 3.2"
Snow: 14.4"
10.6 days with precipitation
March 4.2"
Snow: 9.0"
11.6 days with precipitation
April 3.6"
Snow: 1.6"
11.6 days with precipitation
May 3.3"
11.8 days with precipitation
June 3.9"
10.9 days with precipitation
July 3.3"
9.4 days with precipitation
August 3.2"
9.0 days with precipitation
September 3.6"
9.0 days with precipitation
October 4.0"
Snow: 0.2"
10.5 days with precipitation
November 3.7"
Snow: 0.7"
10.3 days with precipitation
December 4.3"
Snow: 9.0"
11.9 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
November 9
50% probability date
Last Spring Freeze
April 4
50% probability date
Growing Season
219 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,545
Higher = more heating needed
Cooling Degree Days
802
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Humidity & Wind
Monthly averages from hourly observations
| Month | Humidity | Wind (mph) | Clear Sky % | Overcast % |
|---|---|---|---|---|
| January | 58% | 12.1 | 23% | 36% |
| February | 59% | 12.8 | 20% | 41% |
| March | 59% | 12.3 | 19% | 41% |
| April | 61% | 11.4 | 18% | 40% |
| May | 67% | 10.8 | 14% | 38% |
| June | 65% | 10.2 | 14% | 26% |
| July | 68% | 9.6 | 15% | 24% |
| August | 68% | 10.0 | 22% | 22% |
| September | 70% | 10.5 | 24% | 29% |
| October | 65% | 11.4 | 19% | 35% |
| November | 64% | 11.6 | 18% | 39% |
| December | 62% | 12.3 | 20% | 39% |
What Boston Logan's climate means for you
Boston Logan runs 52°F a year - peaking in July, coldest in January.
- Gardeners get about 219 frost-free days, with the last spring freeze near April 4 - plan the planting calendar around it, not the regional average.
- Energy bills track 5,545 heating and 802 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: Boston Logan, MA
Boston Logan, Massachusetts runs an annual average of 52°F, ranging from a mean daily high of 59°F to a mean daily low of 45°F, per NOAA's 1991–2020 climate normals. July is typically the warmest month of the year, while January is the coldest. Drawn from station USW00014739, these thirty-year averages smooth out year-to-year swings into a baseline for what a typical month looks like here.
Precipitation patterns matter as much as temperature for anyone planning to live, garden, or travel here. Boston Logan receives roughly 43.6 inches of precipitation each year, with 49.2 inches typically falling as snow. The frost-free season averages 219 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 4 and the first fall freeze near November 9. For energy use, 5,545 heating degree days and 802 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Boston Logan scores 63/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. For planning purposes, look to the monthly tables above: shoulder seasons bring the mildest highs and lows, summer brings July-driven heat, and deep winter brings January-driven cold. Treat every figure here as a thirty-year average rather than a forecast - individual years routinely run warmer, cooler, wetter, or drier than the normal.
Frequently Asked Questions
What is the average temperature in Boston Logan, MA? ▼
The average annual temperature in Boston Logan, Massachusetts is 52°F. The warmest month averages 82°F (28°C) and the coldest averages 23°F (-5°C).
How much rain does Boston Logan get? ▼
Boston Logan receives 43.6 inches of precipitation annually, including 49.2 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Boston Logan? ▼
Boston Logan has a climate comfort score of 63/100 (Good), milder than 47% of U.S. cities in the PlainClimate database.
When is the growing season in Boston Logan? ▼
Boston Logan has approximately 219 frost-free days per year, with the last spring freeze around April 4 and the first fall freeze around November 9.
How much energy does heating and cooling require in Boston Logan? ▼
Boston Logan has 5,545 heating degree days and 802 cooling degree days annually, a heating-dominated climate. See our <a href="/guides/reading-weather-data/" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this Boston Logan climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USW00014739 near Boston Logan.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USW00014739. For informational purposes only.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.